Tiger Woods, in 3rd tournament since back surgery, walks off course at Firestone

Tiger Woods makes an awkward follow through after hitting from the lip of a fairway bunker on the second hole during the final round of the Bridgestone Invitational golf tournament Sunday, Aug. 3, 2014, at Firestone Country Club in Akron, Ohio. (AP Photo/Mark Duncan) (The Associated Press)

Tiger Woods hits from the lip of a fairway trap on the second hole during the final round of the Bridgestone Invitational golf tournament Sunday, Aug. 3, 2014, at Firestone Country Club in Akron, Ohio. (AP Photo/Mark Duncan) (The Associated Press)

Tiger Woods and caddie Joe Lacava walk to the third green during the final round of the Bridgestone Invitational golf tournament Sunday, Aug. 3, 2014, at Firestone Country Club in Akron, Ohio. (AP Photo/Mark Duncan) (The Associated Press)

AKRON, Ohio – Tiger Woods has withdrawn after eight holes of the Bridgestone Invitational with apparent back pain.

Woods hit a number of shockingly bad shots in the fourth round Sunday at Firestone. After missing the fairway on the ninth hole, he grimaced and reached toward his back. Moments later, he was driven off the course in a cart.

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Woods had back surgery March 31, causing him to miss three months. He returned June 26 at Congressional — about three weeks earlier than expected — and missed the cut by four shots. Woods has reported no problems with his back since returning.

This is the second time this year Woods has withdrawn in the middle of the final round.